F-statistics and estimates of simple regressions on the effects of altitude (m.a.s.l.) on the proportions of social species, non-parasitic species, ground-nesting species, multivoltine species, oligolectic species and on the mean inter-tegular distance (ITD), altitudinal range and geographical distribution of wild bee communities in 34 sites. (The calculations were performed for species-based proportions/means of traits and abundance-weighted proportions/means of traits. Degrees of freedom = 1,32 in all cases.)